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MIPS/o32: Fix internal_syscall5/6/7 

Fix a commit cc25c8b4c1 ("New pthread rwlock that is more scalable.")
regression and prevent uncontrolled stack space usage from happening
when a 5-, 6- or 7-argument syscall wrapper is placed in a loop.

The cause of the problem is the use of `alloca' in regular MIPS/Linux
wrappers to force the use of the frame pointer register in any function
using one or more of these wrappers.  Using the frame pointer register
is required so as not to break frame unwinding as the the stack pointer
is lowered within the inline asm used by these wrappers to make room for
the stack arguments, which 5-, 6- and 7-argument syscalls use with the
o32 ABI.

The regular MIPS/Linux wrappers are macros however, expanded inline, and
stack allocations made with `alloca' are not discarded until the return
of the function they are made in.  Consequently if called in a loop,
then virtual memory is wasted, and if the loop goes through enough
iterations, then ultimately available memory can get exhausted causing
the program to crash.

Address the issue by replacing the inline code with standalone assembly
functions, which rely on the compiler arranging syscall arguments
according to the o32 function calling convention, which MIPS/Linux
syscalls also use, except for the syscall number passed and the error
flag returned.  This way there is no need to fiddle with the stack
pointer anymore and all that has to be handled in the new standalone
functions is the special handling of the syscall number and the error
flag.

Redirect 5-, 6- or 7-argument MIPS16/Linux syscall wrappers to these new
functions as well, so as to avoid an unnecessary double call the
existing wrappers would cause with the new arrangement.

	[BZ #21956]
	* sysdeps/unix/sysv/linux/mips/mips32/mips16/Makefile
	[subdir = misc] (sysdep_routines): Remove `mips16-syscall5',
	`mips16-syscall6' and `mips16-syscall7'.
	(CFLAGS-mips16-syscall5.c, CFLAGS-mips16-syscall6.c)
	(CFLAGS-mips16-syscall7.c): Remove.
	* sysdeps/unix/sysv/linux/mips/mips32/mips16/Versions (libc):
	Remove `__mips16_syscall5', `__mips16_syscall6' and
	`__mips16_syscall7'.
	* sysdeps/unix/sysv/linux/mips/mips32/mips16/mips16-syscall0.c
	(__mips16_syscall0): Rename `__mips16_syscall_return' to
	`__mips_syscall_return'.
	* sysdeps/unix/sysv/linux/mips/mips32/mips16/mips16-syscall1.c
	(__mips16_syscall1): Likewise.
	* sysdeps/unix/sysv/linux/mips/mips32/mips16/mips16-syscall2.c
	(__mips16_syscall2): Likewise.
	* sysdeps/unix/sysv/linux/mips/mips32/mips16/mips16-syscall3.c
	(__mips16_syscall3): Likewise.
	* sysdeps/unix/sysv/linux/mips/mips32/mips16/mips16-syscall4.c
	(__mips16_syscall4): Likewise.
	* sysdeps/unix/sysv/linux/mips/mips32/mips16/mips16-syscall5.c:
	Remove.
	* sysdeps/unix/sysv/linux/mips/mips32/mips16/mips16-syscall6.c:
	Remove.
	* sysdeps/unix/sysv/linux/mips/mips32/mips16/mips16-syscall7.c:
	Remove.
	* sysdeps/unix/sysv/linux/mips/mips32/mips16/mips16-syscall.h
	(__mips16_syscall5): Expand to `__mips_syscall5' rather than
	`__mips16_syscall5'.  Remove prototype.
	(__mips16_syscall6): Expand to `__mips_syscall6' rather than
	`__mips16_syscall6'.  Remove prototype.
	(__mips16_syscall7): Expand to `__mips_syscall7' rather than
	`__mips16_syscall7'.  Remove prototype.
	(__nomips16, __mips16_syscall_return): Move to...
	* sysdeps/unix/sysv/linux/mips/mips32/sysdep.h
	(__nomips16, __mips_syscall_return): ... here.
	[__mips16] (INTERNAL_SYSCALL_NCS): Rename
	`__mips16_syscall_return' to `__mips_syscall_return'.
	[__mips16] (INTERNAL_SYSCALL_MIPS16): Pass `number' to
	`internal_syscall##nr'.
	[!__mips16] (INTERNAL_SYSCALL): Pass `SYS_ify (name)' to
	`internal_syscall##nr'.
	(FORCE_FRAME_POINTER): Remove.
	(__mips_syscall5): New prototype.
	(internal_syscall5): Rewrite to call `__mips_syscall5'.
	(__mips_syscall6): New prototype.
	(internal_syscall6): Rewrite to call `__mips_syscall6'.
	(__mips_syscall7): New prototype.
	(internal_syscall7): Rewrite to call `__mips_syscall7'.
	* sysdeps/unix/sysv/linux/mips/mips32/mips-syscall5.S: New file.
	* sysdeps/unix/sysv/linux/mips/mips32/mips-syscall6.S: New file.
	* sysdeps/unix/sysv/linux/mips/mips32/mips-syscall7.S: New file.
	* sysdeps/unix/sysv/linux/mips/mips32/Makefile [subdir = misc]
	(sysdep_routines): Add libc-do-syscall.
	* sysdeps/unix/sysv/linux/mips/mips32/Versions (libc): Add
	`__mips_syscall5', `__mips_syscall6' and `__mips_syscall7'.
This commit is contained in:
Adhemerval Zanella 2017-08-29 18:31:08 +01:00 committed by Maciej W. Rozycki
parent 01b87c656f
commit 319cbbf633
15 changed files with 208 additions and 186 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

61
ChangeLog
View File

@ -1,3 +1,64 @@
2017-08-29 Adhemerval Zanella <adhemerval.zanella@linaro.org>
Aurelien Jarno <aurelien@aurel32.net>
Maciej W. Rozycki <macro@imgtec.com>
[BZ #21956]
* sysdeps/unix/sysv/linux/mips/mips32/mips16/Makefile
[subdir = misc] (sysdep_routines): Remove `mips16-syscall5',
`mips16-syscall6' and `mips16-syscall7'.
(CFLAGS-mips16-syscall5.c, CFLAGS-mips16-syscall6.c)
(CFLAGS-mips16-syscall7.c): Remove.
* sysdeps/unix/sysv/linux/mips/mips32/mips16/Versions (libc):
Remove `__mips16_syscall5', `__mips16_syscall6' and
`__mips16_syscall7'.
* sysdeps/unix/sysv/linux/mips/mips32/mips16/mips16-syscall0.c
(__mips16_syscall0): Rename `__mips16_syscall_return' to
`__mips_syscall_return'.
* sysdeps/unix/sysv/linux/mips/mips32/mips16/mips16-syscall1.c
(__mips16_syscall1): Likewise.
* sysdeps/unix/sysv/linux/mips/mips32/mips16/mips16-syscall2.c
(__mips16_syscall2): Likewise.
* sysdeps/unix/sysv/linux/mips/mips32/mips16/mips16-syscall3.c
(__mips16_syscall3): Likewise.
* sysdeps/unix/sysv/linux/mips/mips32/mips16/mips16-syscall4.c
(__mips16_syscall4): Likewise.
* sysdeps/unix/sysv/linux/mips/mips32/mips16/mips16-syscall5.c:
Remove.
* sysdeps/unix/sysv/linux/mips/mips32/mips16/mips16-syscall6.c:
Remove.
* sysdeps/unix/sysv/linux/mips/mips32/mips16/mips16-syscall7.c:
Remove.
* sysdeps/unix/sysv/linux/mips/mips32/mips16/mips16-syscall.h
(__mips16_syscall5): Expand to `__mips_syscall5' rather than
`__mips16_syscall5'. Remove prototype.
(__mips16_syscall6): Expand to `__mips_syscall6' rather than
`__mips16_syscall6'. Remove prototype.
(__mips16_syscall7): Expand to `__mips_syscall7' rather than
`__mips16_syscall7'. Remove prototype.
(__nomips16, __mips16_syscall_return): Move to...
* sysdeps/unix/sysv/linux/mips/mips32/sysdep.h
(__nomips16, __mips_syscall_return): ... here.
[__mips16] (INTERNAL_SYSCALL_NCS): Rename
`__mips16_syscall_return' to `__mips_syscall_return'.
[__mips16] (INTERNAL_SYSCALL_MIPS16): Pass `number' to
`internal_syscall##nr'.
[!__mips16] (INTERNAL_SYSCALL): Pass `SYS_ify (name)' to
`internal_syscall##nr'.
(FORCE_FRAME_POINTER): Remove.
(__mips_syscall5): New prototype.
(internal_syscall5): Rewrite to call `__mips_syscall5'.
(__mips_syscall6): New prototype.
(internal_syscall6): Rewrite to call `__mips_syscall6'.
(__mips_syscall7): New prototype.
(internal_syscall7): Rewrite to call `__mips_syscall7'.
* sysdeps/unix/sysv/linux/mips/mips32/mips-syscall5.S: New file.
* sysdeps/unix/sysv/linux/mips/mips32/mips-syscall6.S: New file.
* sysdeps/unix/sysv/linux/mips/mips32/mips-syscall7.S: New file.
* sysdeps/unix/sysv/linux/mips/mips32/Makefile [subdir = misc]
(sysdep_routines): Add libc-do-syscall.
* sysdeps/unix/sysv/linux/mips/mips32/Versions (libc): Add
`__mips_syscall5', `__mips_syscall6' and `__mips_syscall7'.
2017-08-29 Adhemerval Zanella <adhemerval.zanella@linaro.org>
[BZ #21672]

4
sysdeps/unix/sysv/linux/mips/mips32/Makefile
View File

@ -3,6 +3,10 @@ ifeq ($(subdir),conform)
conformtest-xfail-conds += mips-o32-linux
endif
ifeq ($(subdir),misc)
sysdep_routines += mips-syscall5 mips-syscall6 mips-syscall7
endif
ifeq ($(subdir),stdlib)
tests += bug-getcontext-mips-gp
endif

3
sysdeps/unix/sysv/linux/mips/mips32/Versions
View File

@ -3,4 +3,7 @@ libc {
getrlimit64;
setrlimit64;
}
GLIBC_PRIVATE {
__mips_syscall5; __mips_syscall6; __mips_syscall7;
}
}

32
sysdeps/unix/sysv/linux/mips/mips32/mips16/mips16-syscall5.c → sysdeps/unix/sysv/linux/mips/mips32/mips-syscall5.S
View File

@ -1,5 +1,5 @@
/* MIPS16 syscall wrappers.
Copyright (C) 2013-2017 Free Software Foundation, Inc.
/* MIPS syscall wrappers.
Copyright (C) 2017 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@ -13,21 +13,23 @@
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
License along with the GNU C Library. If not, see
<http://www.gnu.org/licenses/>. */
#include <sysdep.h>
#include <mips16-syscall.h>
#include <sys/asm.h>
#undef __mips16_syscall5
.text
.set nomips16
long long __nomips16
__mips16_syscall5 (long a0, long a1, long a2, long a3,
long a4,
long number)
{
union __mips16_syscall_return ret;
ret.reg.v0 = INTERNAL_SYSCALL_MIPS16 (number, ret.reg.v1, 5,
a0, a1, a2, a3, a4);
return ret.val;
}
/* long long __mips_syscall5 (long arg1, long arg2, long arg3, long arg4,
long arg5,
long number) */
ENTRY(__mips_syscall5)
lw v0, 20(sp)
syscall
move v1, a3
jr ra
END(__mips_syscall5)
libc_hidden_def (__mips_syscall5)

32
sysdeps/unix/sysv/linux/mips/mips32/mips16/mips16-syscall6.c → sysdeps/unix/sysv/linux/mips/mips32/mips-syscall6.S
View File

@ -1,5 +1,5 @@
/* MIPS16 syscall wrappers.
Copyright (C) 2013-2017 Free Software Foundation, Inc.
/* MIPS syscall wrappers.
Copyright (C) 2017 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@ -13,21 +13,23 @@
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
License along with the GNU C Library. If not, see
<http://www.gnu.org/licenses/>. */
#include <sysdep.h>
#include <mips16-syscall.h>
#include <sys/asm.h>
#undef __mips16_syscall6
.text
.set nomips16
long long __nomips16
__mips16_syscall6 (long a0, long a1, long a2, long a3,
long a4, long a5,
long number)
{
union __mips16_syscall_return ret;
ret.reg.v0 = INTERNAL_SYSCALL_MIPS16 (number, ret.reg.v1, 6,
a0, a1, a2, a3, a4, a5);
return ret.val;
}
/* long long __mips_syscall6 (long arg1, long arg2, long arg3, long arg4,
long arg5, long arg6,
long number) */
ENTRY(__mips_syscall6)
lw v0, 24(sp)
syscall
move v1, a3
jr ra
END(__mips_syscall6)
libc_hidden_def (__mips_syscall6)

32
sysdeps/unix/sysv/linux/mips/mips32/mips16/mips16-syscall7.c → sysdeps/unix/sysv/linux/mips/mips32/mips-syscall7.S
View File

@ -1,5 +1,5 @@
/* MIPS16 syscall wrappers.
Copyright (C) 2013-2017 Free Software Foundation, Inc.
/* MIPS syscall wrappers.
Copyright (C) 2017 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@ -13,21 +13,23 @@
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
License along with the GNU C Library. If not, see
<http://www.gnu.org/licenses/>. */
#include <sysdep.h>
#include <mips16-syscall.h>
#include <sys/asm.h>
#undef __mips16_syscall7
.text
.set nomips16
long long __nomips16
__mips16_syscall7 (long a0, long a1, long a2, long a3,
long a4, long a5, long a6,
long number)
{
union __mips16_syscall_return ret;
ret.reg.v0 = INTERNAL_SYSCALL_MIPS16 (number, ret.reg.v1, 7,
a0, a1, a2, a3, a4, a5, a6);
return ret.val;
}
/* long long __mips_syscall7 (long arg1, long arg2, long arg3, long arg4,
long arg5, long arg6, long arg7,
long number) */
ENTRY(__mips_syscall7)
lw v0, 28(sp)
syscall
move v1, a3
jr ra
END(__mips_syscall7)
libc_hidden_def (__mips_syscall7)

6
sysdeps/unix/sysv/linux/mips/mips32/mips16/Makefile
View File

@ -1,13 +1,9 @@
ifeq ($(subdir),misc)
sysdep_routines += mips16-syscall0 mips16-syscall1 mips16-syscall2
sysdep_routines += mips16-syscall3 mips16-syscall4 mips16-syscall5
sysdep_routines += mips16-syscall6 mips16-syscall7
sysdep_routines += mips16-syscall3 mips16-syscall4
CFLAGS-mips16-syscall0.c += -fexceptions
CFLAGS-mips16-syscall1.c += -fexceptions
CFLAGS-mips16-syscall2.c += -fexceptions
CFLAGS-mips16-syscall3.c += -fexceptions
CFLAGS-mips16-syscall4.c += -fexceptions
CFLAGS-mips16-syscall5.c += -fexceptions
CFLAGS-mips16-syscall6.c += -fexceptions
CFLAGS-mips16-syscall7.c += -fexceptions
endif

2
sysdeps/unix/sysv/linux/mips/mips32/mips16/Versions
View File

@ -1,6 +1,6 @@
libc {
GLIBC_PRIVATE {
__mips16_syscall0; __mips16_syscall1; __mips16_syscall2; __mips16_syscall3;
__mips16_syscall4; __mips16_syscall5; __mips16_syscall6; __mips16_syscall7;
__mips16_syscall4;
}
}

44
sysdeps/unix/sysv/linux/mips/mips32/mips16/mips16-syscall.h
View File

@ -19,19 +19,6 @@
#ifndef MIPS16_SYSCALL_H
#define MIPS16_SYSCALL_H 1
#define __nomips16 __attribute__ ((nomips16))
union __mips16_syscall_return
{
long long val;
struct
{
long v0;
long v1;
}
reg;
};
long long __nomips16 __mips16_syscall0 (long number);
#define __mips16_syscall0(dummy, number) \
__mips16_syscall0 ((long) (number))
@ -61,29 +48,22 @@ long long __nomips16 __mips16_syscall4 (long a0, long a1, long a2, long a3,
(long) (a3), \
(long) (number))
long long __nomips16 __mips16_syscall5 (long a0, long a1, long a2, long a3,
long a4,
long number);
/* The remaining ones use regular MIPS wrappers. */
#define __mips16_syscall5(a0, a1, a2, a3, a4, number) \
__mips16_syscall5 ((long) (a0), (long) (a1), (long) (a2), \
(long) (a3), (long) (a4), \
(long) (number))
__mips_syscall5 ((long) (a0), (long) (a1), (long) (a2), \
(long) (a3), (long) (a4), \
(long) (number))
long long __nomips16 __mips16_syscall6 (long a0, long a1, long a2, long a3,
long a4, long a5,
long number);
#define __mips16_syscall6(a0, a1, a2, a3, a4, a5, number) \
__mips16_syscall6 ((long) (a0), (long) (a1), (long) (a2), \
(long) (a3), (long) (a4), (long) (a5), \
(long) (number))
__mips_syscall6 ((long) (a0), (long) (a1), (long) (a2), \
(long) (a3), (long) (a4), (long) (a5), \
(long) (number))
long long __nomips16 __mips16_syscall7 (long a0, long a1, long a2, long a3,
long a4, long a5, long a6,
long number);
#define __mips16_syscall7(a0, a1, a2, a3, a4, a5, a6, number) \
__mips16_syscall7 ((long) (a0), (long) (a1), (long) (a2), \
(long) (a3), (long) (a4), (long) (a5), \
(long) (a6), \
(long) (number))
__mips_syscall7 ((long) (a0), (long) (a1), (long) (a2), \
(long) (a3), (long) (a4), (long) (a5), \
(long) (a6), \
(long) (number))
#endif

3
sysdeps/unix/sysv/linux/mips/mips32/mips16/mips16-syscall0.c
View File

@ -17,14 +17,13 @@
<http://www.gnu.org/licenses/>. */
#include <sysdep.h>
#include <mips16-syscall.h>
#undef __mips16_syscall0
long long __nomips16
__mips16_syscall0 (long number)
{
union __mips16_syscall_return ret;
union __mips_syscall_return ret;
ret.reg.v0 = INTERNAL_SYSCALL_MIPS16 (number, ret.reg.v1, 0);
return ret.val;
}

3
sysdeps/unix/sysv/linux/mips/mips32/mips16/mips16-syscall1.c
View File

@ -17,7 +17,6 @@
<http://www.gnu.org/licenses/>. */
#include <sysdep.h>
#include <mips16-syscall.h>
#undef __mips16_syscall1
@ -25,7 +24,7 @@ long long __nomips16
__mips16_syscall1 (long a0,
long number)
{
union __mips16_syscall_return ret;
union __mips_syscall_return ret;
ret.reg.v0 = INTERNAL_SYSCALL_MIPS16 (number, ret.reg.v1, 1,
a0);
return ret.val;

3
sysdeps/unix/sysv/linux/mips/mips32/mips16/mips16-syscall2.c
View File

@ -17,7 +17,6 @@
<http://www.gnu.org/licenses/>. */
#include <sysdep.h>
#include <mips16-syscall.h>
#undef __mips16_syscall2
@ -25,7 +24,7 @@ long long __nomips16
__mips16_syscall2 (long a0, long a1,
long number)
{
union __mips16_syscall_return ret;
union __mips_syscall_return ret;
ret.reg.v0 = INTERNAL_SYSCALL_MIPS16 (number, ret.reg.v1, 2,
a0, a1);
return ret.val;

3
sysdeps/unix/sysv/linux/mips/mips32/mips16/mips16-syscall3.c
View File

@ -17,7 +17,6 @@
<http://www.gnu.org/licenses/>. */
#include <sysdep.h>
#include <mips16-syscall.h>
#undef __mips16_syscall3
@ -25,7 +24,7 @@ long long __nomips16
__mips16_syscall3 (long a0, long a1, long a2,
long number)
{
union __mips16_syscall_return ret;
union __mips_syscall_return ret;
ret.reg.v0 = INTERNAL_SYSCALL_MIPS16 (number, ret.reg.v1, 3,
a0, a1, a2);
return ret.val;

3
sysdeps/unix/sysv/linux/mips/mips32/mips16/mips16-syscall4.c
View File

@ -17,7 +17,6 @@
<http://www.gnu.org/licenses/>. */
#include <sysdep.h>
#include <mips16-syscall.h>
#undef __mips16_syscall4
@ -25,7 +24,7 @@ long long __nomips16
__mips16_syscall4 (long a0, long a1, long a2, long a3,
long number)
{
union __mips16_syscall_return ret;
union __mips_syscall_return ret;
ret.reg.v0 = INTERNAL_SYSCALL_MIPS16 (number, ret.reg.v1, 4,
a0, a1, a2, a3);
return ret.val;

163
sysdeps/unix/sysv/linux/mips/mips32/sysdep.h
View File

@ -98,6 +98,19 @@
#undef INTERNAL_SYSCALL
#undef INTERNAL_SYSCALL_NCS
#define __nomips16 __attribute__ ((nomips16))
union __mips_syscall_return
{
long long val;
struct
{
long v0;
long v1;
}
reg;
};
#ifdef __mips16
/* There's no MIPS16 syscall instruction, so we go through out-of-line
standard MIPS wrappers. These do use inline snippets below though,
@ -112,7 +125,7 @@
# define INTERNAL_SYSCALL_NCS(number, err, nr, args...) \
({ \
union __mips16_syscall_return _sc_ret; \
union __mips_syscall_return _sc_ret; \
_sc_ret.val = __mips16_syscall##nr (args, number); \
err = _sc_ret.reg.v1; \
_sc_ret.reg.v0; \
@ -121,13 +134,13 @@
# define INTERNAL_SYSCALL_MIPS16(number, err, nr, args...) \
internal_syscall##nr ("lw\t%0, %2\n\t", \
"R" (number), \
0, err, args)
number, err, args)
#else /* !__mips16 */
# define INTERNAL_SYSCALL(name, err, nr, args...) \
internal_syscall##nr ("li\t%0, %2\t\t\t# " #name "\n\t", \
"IK" (SYS_ify (name)), \
0, err, args)
SYS_ify (name), err, args)
# define INTERNAL_SYSCALL_NCS(number, err, nr, args...) \
internal_syscall##nr (MOVE32 "\t%0, %2\n\t", \
@ -262,110 +275,74 @@
_sys_result; \
})
/* We need to use a frame pointer for the functions in which we
adjust $sp around the syscall, or debug information and unwind
information will be $sp relative and thus wrong during the syscall. As
of GCC 4.7, this is sufficient. */
#define FORCE_FRAME_POINTER \
void *volatile __fp_force __attribute__ ((unused)) = alloca (4)
/* Standalone MIPS wrappers used for 5, 6, and 7 argument syscalls,
which require stack arguments. We rely on the compiler arranging
wrapper's arguments according to the MIPS o32 function calling
convention, which is reused by syscalls, except for the syscall
number passed and the error flag returned (taken care of in the
wrapper called). This relieves us from relying on non-guaranteed
compiler specifics required for the stack arguments to be pushed,
which would be the case if these syscalls were inlined. */
long long __nomips16 __mips_syscall5 (long arg1, long arg2, long arg3,
long arg4, long arg5,
long number);
libc_hidden_proto (__mips_syscall5, nomips16)
#define internal_syscall5(v0_init, input, number, err, \
arg1, arg2, arg3, arg4, arg5) \
({ \
long _sys_result; \
\
FORCE_FRAME_POINTER; \
{ \
register long __s0 asm ("$16") __attribute__ ((unused)) \
= (number); \
register long __v0 asm ("$2"); \
register long __a0 asm ("$4") = (long) (arg1); \
register long __a1 asm ("$5") = (long) (arg2); \
register long __a2 asm ("$6") = (long) (arg3); \
register long __a3 asm ("$7") = (long) (arg4); \
__asm__ volatile ( \
".set\tnoreorder\n\t" \
"subu\t$29, 32\n\t" \
"sw\t%6, 16($29)\n\t" \
v0_init \
"syscall\n\t" \
"addiu\t$29, 32\n\t" \
".set\treorder" \
: "=r" (__v0), "+r" (__a3) \
: input, "r" (__a0), "r" (__a1), "r" (__a2), \
"r" ((long) (arg5)) \
: __SYSCALL_CLOBBERS); \
err = __a3; \
_sys_result = __v0; \
} \
_sys_result; \
union __mips_syscall_return _sc_ret; \
_sc_ret.val = __mips_syscall5 ((long) (arg1), \
(long) (arg2), \
(long) (arg3), \
(long) (arg4), \
(long) (arg5), \
(long) (number)); \
err = _sc_ret.reg.v1; \
_sc_ret.reg.v0; \
})
long long __nomips16 __mips_syscall6 (long arg1, long arg2, long arg3,
long arg4, long arg5, long arg6,
long number);
libc_hidden_proto (__mips_syscall6, nomips16)
#define internal_syscall6(v0_init, input, number, err, \
arg1, arg2, arg3, arg4, arg5, arg6) \
({ \
long _sys_result; \
\
FORCE_FRAME_POINTER; \
{ \
register long __s0 asm ("$16") __attribute__ ((unused)) \
= (number); \
register long __v0 asm ("$2"); \
register long __a0 asm ("$4") = (long) (arg1); \
register long __a1 asm ("$5") = (long) (arg2); \
register long __a2 asm ("$6") = (long) (arg3); \
register long __a3 asm ("$7") = (long) (arg4); \
__asm__ volatile ( \
".set\tnoreorder\n\t" \
"subu\t$29, 32\n\t" \
"sw\t%6, 16($29)\n\t" \
"sw\t%7, 20($29)\n\t" \
v0_init \
"syscall\n\t" \
"addiu\t$29, 32\n\t" \
".set\treorder" \
: "=r" (__v0), "+r" (__a3) \
: input, "r" (__a0), "r" (__a1), "r" (__a2), \
"r" ((long) (arg5)), "r" ((long) (arg6)) \
: __SYSCALL_CLOBBERS); \
err = __a3; \
_sys_result = __v0; \
} \
_sys_result; \
union __mips_syscall_return _sc_ret; \
_sc_ret.val = __mips_syscall6 ((long) (arg1), \
(long) (arg2), \
(long) (arg3), \
(long) (arg4), \
(long) (arg5), \
(long) (arg6), \
(long) (number)); \
err = _sc_ret.reg.v1; \
_sc_ret.reg.v0; \
})
long long __nomips16 __mips_syscall7 (long arg1, long arg2, long arg3,
long arg4, long arg5, long arg6,
long arg7,
long number);
libc_hidden_proto (__mips_syscall7, nomips16)
#define internal_syscall7(v0_init, input, number, err, \
arg1, arg2, arg3, arg4, arg5, arg6, arg7) \
({ \
long _sys_result; \
\
FORCE_FRAME_POINTER; \
{ \
register long __s0 asm ("$16") __attribute__ ((unused)) \
= (number); \
register long __v0 asm ("$2"); \
register long __a0 asm ("$4") = (long) (arg1); \
register long __a1 asm ("$5") = (long) (arg2); \
register long __a2 asm ("$6") = (long) (arg3); \
register long __a3 asm ("$7") = (long) (arg4); \
__asm__ volatile ( \
".set\tnoreorder\n\t" \
"subu\t$29, 32\n\t" \
"sw\t%6, 16($29)\n\t" \
"sw\t%7, 20($29)\n\t" \
"sw\t%8, 24($29)\n\t" \
v0_init \
"syscall\n\t" \
"addiu\t$29, 32\n\t" \
".set\treorder" \
: "=r" (__v0), "+r" (__a3) \
: input, "r" (__a0), "r" (__a1), "r" (__a2), \
"r" ((long) (arg5)), "r" ((long) (arg6)), "r" ((long) (arg7)) \
: __SYSCALL_CLOBBERS); \
err = __a3; \
_sys_result = __v0; \
} \
_sys_result; \
union __mips_syscall_return _sc_ret; \
_sc_ret.val = __mips_syscall7 ((long) (arg1), \
(long) (arg2), \
(long) (arg3), \
(long) (arg4), \
(long) (arg5), \
(long) (arg6), \
(long) (arg7), \
(long) (number)); \
err = _sc_ret.reg.v1; \
_sc_ret.reg.v0; \
})
#define __SYSCALL_CLOBBERS "$1", "$3", "$8", "$9", "$10", "$11", "$12", "$13", \